Enable relro / bind_now when compiling Android applications.
This marks certain regions of memory as read-only after linking,
making memory corruption security vulnerabilities are harder
to exploit.
See:
* http://www.akkadia.org/drepper/nonselsec.pdf (section 6)
* http://tk-blog.blogspot.com/2009/02/relro-not-so-well-known-memory.html
relro support has been enabled for ARM since
233d460f21d372f964f8078b8b0d5fd17af7c6b6.
This change enables it for x86.
Change-Id: Ib90704f2fecffcfdc3587607112804faa0e16385
TARGET_GLOBAL_LDFLAGS += -m32
TARGET_GLOBAL_LDFLAGS += -Wl,-z,noexecstack
+TARGET_GLOBAL_LDFLAGS += -Wl,-z,relro -Wl,-z,now
TARGET_GLOBAL_LDFLAGS += -Wl,--gc-sections
TARGET_C_INCLUDES := \