Some packages need to specify -std=gnu89 to compile, and gcc51 defaults to
gnu11 now.
Also, updated mozilla-nss-nspr to 3.19 and 4.10.8, respectively.

@@ -1,2 +1,3 @@
 configure.patch -p0
 remove-cfmakeflags.patch -p0
+gcc5.patch -p1