toolchain: introduce BR2_TOOLCHAIN_HAS_BINUTILS_BUG_30730

libheif package fails to build for the M68K architecture due to a binutils
bug that leads to:
Internal error in emit_expr_encoded at dw2gencfi.c:215

Let's add binutils bug to avoid to deal with architectures in packages
when a binutils bug arises. Let's instead deal directly with binutils
bug number.

It's been reported upstream:
https://sourceware.org/bugzilla/show_bug.cgi?id=30730

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

toolchain/Config.in

@@ -77,6 +77,12 @@ config BR2_TOOLCHAIN_HAS_BINUTILS_BUG_27597
 	bool
 	default y if BR2_nios2
 
+# https://sourceware.org/bugzilla/show_bug.cgi?id=30730
+# Affect toolchains built with binutils 2.40, still not fixed.
+config BR2_TOOLCHAIN_HAS_BINUTILS_BUG_30730
+	bool
+	default y if BR2_m68k_cf
+
 # Atomic types can be:
 #  - never lock-free
 #  - sometimes lock-free