Set NSPR version to 4.2.

nsprpub/pr/include/prinit.h

@@ -60,11 +60,11 @@ PR_BEGIN_EXTERN_C
 ** The format of the version string is
 **     "<major version>.<minor version>[.<patch level>] [<Beta>]"
 */
-#define PR_VERSION  "4.2 Beta"
+#define PR_VERSION  "4.2"
 #define PR_VMAJOR   4
 #define PR_VMINOR   2
 #define PR_VPATCH   0
-#define PR_BETA     PR_TRUE
+#define PR_BETA     PR_FALSE
 
 /*
 ** PRVersionCheck