Sjavac doesn't detect 32-bit jvm properly

Sjavac tries to size its working size depending on available memory and if it's running in a 32 bit or 64 bit jvm. The detection for 32bit is flawed and misses several cases. With this patch it's covering a lot more cases:

diff -r ec434cfd2752 src/share/classes/com/sun/tools/sjavac/CompileJavaPackages.java
--- a/src/share/classes/com/sun/tools/sjavac/CompileJavaPackages.java
+++ b/src/share/classes/com/sun/tools/sjavac/CompileJavaPackages.java
@@ -136,7 +136,9 @@
         // for each compile.....
         int kbPerFile = 175;
         String osarch = System.getProperty("os.arch");
- if (osarch.equals("i386")) {
+ String dataModel = System.getProperty("sun.arch.data.model");
+ if (dataModel.equals("32") || osarch.equals("i386")
+ || osarch.equals("x86") || osarch.equals("sparc")) {
             // For 32 bit platforms, assume it is slightly smaller
             // because of smaller object headers and pointers.
             kbPerFile = 119;

Adding this is required for sjavac to function properly on several platforms in jprt.