Bug 709170 - Don't bother generating Java debug symbols for local variables. Saves 70 KB. r=dougt

config/android-common.mk

@@ -70,6 +70,6 @@ JAVAC_FLAGS = \
   -classpath $(JAVA_CLASSPATH) \
   -bootclasspath $(JAVA_BOOTCLASSPATH) \
   -encoding UTF8 \
-  -g \
+  -g:source,lines \
   -Werror \
   $(NULL)