COMPMID-481: Add AArch32 GEMM

Change-Id: Idba0b30bfb27866a46a22388014ab81432ea28dc
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/86196
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
diff --git a/SConscript b/SConscript
index 26bcc4a..15ef090 100644
--- a/SConscript
+++ b/SConscript
@@ -169,6 +169,9 @@
     core_files += Glob('src/core/NEON/*.cpp')
     core_files += Glob('src/core/NEON/kernels/*.cpp')
 
+    if env['arch'] == "armv7a":
+        core_files += Glob('src/core/NEON/kernels/arm32/*.cpp')
+
     if "arm64-v8" in env['arch']:
         core_files += Glob('src/core/NEON/kernels/arm64/*.cpp')