buildman: Add gcc 4.9.0 with Microblaze toolchain

Also read gcc 4.9.0 at kernel.org which also have Microblaze toolchain.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>

Fixed unit test failure by updating the test:
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/buildman/README b/tools/buildman/README
index e870d54..8ecdd8f 100644
--- a/tools/buildman/README
+++ b/tools/buildman/README
@@ -348,7 +348,7 @@
    arc, arm, avr32, blackfin, m68k, microblaze, mips, nds32, nios2, openrisc
    powerpc, sandbox, sh, sparc, x86
 
-Of these, only arc, microblaze and nds32 are not available at kernel.org..
+Of these, only arc and nds32 are not available at kernel.org..
 
 
 How to run it