libgc fix for x86 need it for guile (#1588)

packages/libgc/build.sh

@@ -4,7 +4,7 @@ TERMUX_PKG_VERSION=7.6.0
 TERMUX_PKG_SRCURL=http://www.hboehm.info/gc/gc_source/gc-${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_SHA256=a14a28b1129be90e55cd6f71127ffc5594e1091d5d54131528c24cd0c03b7d90
 TERMUX_PKG_RM_AFTER_INSTALL="share/gc"
-
+TERMUX_PKG_REVISION=1
 termux_step_post_extract_package () {
 	LIBATOMIC_VERSION=7.4.6
 	LIBATOMIC_FILE=libatomic_ops-${LIBATOMIC_VERSION}.tar.gz

packages/libgc/os_dep.c.patch

@@ -0,0 +1,14 @@
+--- ../cache/gc-7.6.0/os_dep.c	2016-08-02 19:36:14.000000000 +0000
++++ ./os_dep.c	2017-09-27 01:02:30.156628565 +0000
+@@ -426,7 +426,10 @@
+ 
+ #   if (defined(LINUX) || defined(HURD)) && !defined(IGNORE_PROG_DATA_START)
+       /* Try the easy approaches first: */
+-#     ifdef PLATFORM_ANDROID
++	/* this workaround for gold linker when only aarch64 is using it in 
++	  termux breaks x86_64 and x86 builds */
++
++#   if defined(PLATFORM_ANDROID) && !defined(__x86_64__) && !defined(__i386__)
+         /* Workaround for "gold" (default) linker (as of Android NDK r10e). */
+         if ((word)__data_start < (word)_etext
+             && (word)_etext < (word)__dso_handle) {