gcc 4.9.x: Exclude for PPC SPE because of PR60102

Exclude gcc 4.9.x for PowerPC SPE toolchains because of an ICE
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60102
There's a patch available but it's somewhat intrusive with PPC in
general and hasn't been well tested yet.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/gcc/Config.in.host

@@ -59,6 +59,8 @@ choice
 
 	config BR2_GCC_VERSION_4_9_X
 		depends on !BR2_arc && !BR2_avr32 && !BR2_bfin && !BR2_sparc_sparchfleon && !BR2_sparc_sparchfleonv8 && !BR2_sparc_sparcsfleon && !BR2_sparc_sparcsfleonv8 && !BR2_sparc
+		# PR60102 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60102
+		depends on !BR2_powerpc_SPE
 		select BR2_GCC_NEEDS_MPC
 		select BR2_GCC_SUPPORTS_GRAPHITE
 		bool "gcc 4.9.x"