[GR-46399] Use -Xms14g when building libpythonvm

Author: eregon

mx.graalpython/mx_graalpython.py

@@ -2305,6 +2305,7 @@ def as_license_regex(name):
             jar_distributions=['graalpython:GRAALPYTHON-LAUNCHER', 'sdk:MAVEN_DOWNLOADER'],
             main_class=GRAALPYTHON_MAIN_CLASS,
             build_args=[
+                '-J-Xms14g', # GR-46399: libpythonvm needs more than the default minimum of 8 GB to be built
                 '-H:+DetectUserDirectoriesInImageHeap',
                 '-H:-CopyLanguageResources',
                 '-Dpolyglot.python.PosixModuleBackend=native',