[tools] sdcc: compiling SDCCicode.c with -O2 sends gcc 4.6.x into an infinite loop, workaround it

See references:
  http://sourceforge.net/tracker/?func=detail&aid=3285611&group_id=599&atid=300599
  http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52653


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@31236 3c298f89-4303-0410-b956-a3cf2f4a3e73

tools/sdcc/patches/100-workaround-gcc-4.6.2-hang.patch

@@ -0,0 +1,20 @@
+--- a/src/SDCCicode.c
++++ b/src/SDCCicode.c
+@@ -1130,6 +1130,9 @@ iCode *getBuiltinParms (iCode *ic, int *
+     return ic;
+ }
+ 
++#pragma GCC push_options
++#pragma GCC optimize ("O0")
++
+ /*-----------------------------------------------------------------*/
+ /* operandOperation - performs operations on operands             */
+ /*-----------------------------------------------------------------*/
+@@ -1405,6 +1408,7 @@ operandOperation (operand * left, operan
+ 
+   return retval;
+ }
++#pragma GCC pop_options
+ 
+ 
+ /*-----------------------------------------------------------------*/