gcc: add patch from gcc-4.9-branch that fixes gcc bug 61801.

Without this patch, gcc-4.9.1 miscompiles glibc-2.20 setxid NTPL code,
resulting in setgid() returning ENOSYS.

srcpkgs/gcc/patches/gcc-bug-61801.patch

@@ -0,0 +1,14 @@
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61801
+
+--- gcc/sched-deps.c	2014/04/11 12:49:40	209304
++++ gcc/sched-deps.c	2014/07/17 07:48:49	212739
+@@ -2750,7 +2750,8 @@
+ 	   Consider for instance a volatile asm that changes the fpu rounding
+ 	   mode.  An insn should not be moved across this even if it only uses
+ 	   pseudo-regs because it might give an incorrectly rounded result.  */
+-	if (code != ASM_OPERANDS || MEM_VOLATILE_P (x))
++	if ((code != ASM_OPERANDS || MEM_VOLATILE_P (x))
++	    && !DEBUG_INSN_P (insn))
+ 	  reg_pending_barrier = TRUE_BARRIER;
+ 
+ 	/* For all ASM_OPERANDS, we must traverse the vector of input operands.

srcpkgs/gcc/template

@@ -2,7 +2,7 @@
 pkgname=gcc
 _majorver=4.9
 version=${_majorver}.1
-revision=7
+revision=8
 short_desc="The GNU C Compiler"
 maintainer="Juan RP <xtraeme@gmail.com>"
 homepage="http://gcc.gnu.org"
@@ -17,8 +17,7 @@ if [ "$CHROOT_READY" ]; then
 	hostmakedepends="perl flex"
 fi
 makedepends="zlib-devel libmpc-devel>=1.0.1_2 cloog-devel>=0.18"
-
-depends="binutils"
+depends="binutils glibc-devel"
 # mudflap is gone in 4.9
 replaces="libmudflap>=0 libmudflap-devel>=0 chroot-gcc>=0"