This further patch (against 2.4.7 sources) is also required to get JS to not crash and burn on armhf (Raspberry Pi):
--- a/debian/rules 2014-12-01 03:10:49.000000000 +0000
+++ b/debian/rules 2014-12-03 05:26:26.000000000 +0000
@@ -57,7 +57,7 @@
endif
# disable jit on some architectures (bug #651636)
-ifneq (,$(filter $(DEB_BUILD_ARCH),armel mips mipsel))
+ifneq (,$(filter $(DEB_BUILD_ARCH),armel armhf mips mipsel))
COMMON_CONFIGURE_ARGUMENTS += --disable-jit
endif
