8311285: report some fontconfig related environment variables in hs_err file

Backport-of: 0ef03f122866f010ebf50683097e9b92e41cdaad

Author: MBaesken

src/hotspot/share/utilities/vmError.cpp

@@ -83,6 +83,8 @@ const char *env_list[] = {
   "JAVA_HOME", "JRE_HOME", "JAVA_TOOL_OPTIONS", "_JAVA_OPTIONS", "CLASSPATH",
   "JAVA_COMPILER", "PATH", "USERNAME",
 
+  "XDG_CACHE_HOME", "XDG_CONFIG_HOME", "FC_LANG", "FONTCONFIG_USE_MMAP",
+
   // Env variables that are defined on Solaris/Linux/BSD
   "LD_LIBRARY_PATH", "LD_PRELOAD", "SHELL", "DISPLAY",
   "HOSTTYPE", "OSTYPE", "ARCH", "MACHTYPE",