Merge pull request #459 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:jvmtrend-perf-fixes to master

* commit '083469db':
  Explanatory comment in ClassHierarchyNode
  ValueProfiles in specials + few other places

Merge pull request #461 in G/fastr from ~MICK.JORDAN_ORACLE.COM/fastr:feature/internal-pkgtest to master

* commit 'a2e61505':
  pkgtest: document —no-install option
  pkgtest: refactor to use internal GNU R when possible; misc other changes for daily recommended packages test

pkgtest: refactor to use internal GNU R when possible; misc other changes for daily recommended packages test

Merge pull request #458 in G/fastr from ~MICK.JORDAN_ORACLE.COM/fastr:bugfix/solaris-build-2 to master

* commit '59d07024':
  set XZ_HOME package download, fix -m64 regression in GNU R build for Solaris, solaris arch is sparcv9

set XZ_HOME package download, fix -m64 regression in GNU R build for Solaris, solaris arch is sparcv9

* commit '91be8650':
  small cleanups
  fix to argument matching: don't complain if args like (xy, x) are matched exactly
  implement Rf_classgets
  small fixes in native code
  fix imports
  refactor isVector (cache mode to type conversion)

* commit '9659c84f':
  changes for R-3.3.1

Merge pull request #422 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/replace-refactoring to master

* commit '3a5fb0c7':
  ReplacementBlockNode -> ReplacementDispatchNode
  Create special replacement even for <<-
  RCodeBuilder has context with temp var names start index
  Additional list extract tests
  Replacement executes the target first to specialize
  Replacement refactoring

* commit 'ac6d0bb8':
  install order matters for recommended packages

* commit '6031acb5':
  mx.fastr: remove nocompile in _set_graal_options
  remove redundant mx rcmplib
  support jars and dirs in DefaultResourceHandlerfactory
  add explicit method for accessing directory "resources"
  mx_fastr_dists: add doc comment
  properly ensure that recommended packages can be built in all situations and are included in the release

plus remove unnecessary try-finally and obsolete TODO comment

Now when the reading and writing of the target is responsibility of
ReplacementNode, SpecialReplacementNode works even with <<- (super)

Instead of having static variable with this value, it is part of RCodeBuilder
and transitively part of RContext.

The ReplacementBlockNode executes RHS and the target and
then executes ReplacementNode, which can specialize on
target value. In the default case ReplacementNode creates
nodes that handle replacement in the same way as before:
SpecialReplacementNode and GenericReplacementNode.

Replacements are broken down to individual calls lazily on first execution.
This is done by new ReplacementBlockNode, which executes RHS store to tmp
variable then the actual replacement and then it returns the RHS value.

ReplacementBlockNode creates the node for actual replacement depending on the
replacement structure: if all the calls are specials, it creates
ReplacementNodeSpecial, which takes advantage of the properties of specials.
Otherwise it creates regular replacement node that executes exactly the same
function calls as GnuR would.

Merge pull request #446 in G/fastr from ~STEPAN.SINDELAR_ORACLE.COM/fastr:feature/fixes-for-jvmtrend2 to master

* commit 'b21c05cd':
  Removed flag forNextMethod from argument matching
  Tests for NextMethod argument matching
  Covcor converted to cast pipelines + tests
  Varargs related methods moved from ArgumentsSignature to new class VarArgsHelper

The flag seems to be not needed anymore since we now do the argument matching
for NextMethod in more generic way.