Add support for FindJava on HP-UX and alpha

This commit fixes BUG: 0010242. It now properly inspect specific directory
on hp-ux and alpha implementation of the JRE

Modules/FindJNI.cmake

@@ -226,6 +226,8 @@ FIND_PATH(JAVA_INCLUDE_PATH2 jni_md.h
   ${JAVA_INCLUDE_PATH}/linux
   ${JAVA_INCLUDE_PATH}/freebsd
   ${JAVA_INCLUDE_PATH}/solaris
+  ${JAVA_INCLUDE_PATH}/hp-ux
+  ${JAVA_INCLUDE_PATH}/alpha
 )
 
 FIND_PATH(JAVA_AWT_INCLUDE_PATH jawt.h