toolchain: introduce BR2_TOOLCHAIN_HAS_GCC_BUG_101737

pixman package fails to build for the SH4 architecture with optimization
enabled with gcc up to 11.1.0:
http://autobuild.buildroot.net/results/b20/b20869bbb48edb1f0a847ea9e2e1a0462d6350be/

It's been reported upstream:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101737

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

toolchain/Config.in

@@ -176,6 +176,13 @@ config BR2_TOOLCHAIN_HAS_GCC_BUG_99140
 	bool
 	default y if BR2_nios2 && !BR2_TOOLCHAIN_GCC_AT_LEAST_8
 
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101737
+# ICE: SH4 -Os causes internal compiler error. This bug
+# still exists in gcc = 11.1.0
+config BR2_TOOLCHAIN_HAS_GCC_BUG_101737
+	bool
+	default y if BR2_sh4
+
 config BR2_TOOLCHAIN_HAS_NATIVE_RPC
 	bool