travis-ci: Add more architectures

We can now build for microblaze, sh4 and xtensa.

Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Heiko Schocher <hs@denx.de>

.travis.yml

@@ -109,6 +109,9 @@ matrix:
         - BUILDMAN="m68k"
           TOOLCHAIN="m68k"
     - env:
+        - BUILDMAN="microblaze"
+          TOOLCHAIN="microblaze"
+    - env:
         - BUILDMAN="mips"
           TOOLCHAIN="mips"
     - env:
@@ -142,6 +145,12 @@ matrix:
     - env:
         - BUILDMAN="aarch64"
           TOOLCHAIN="aarch64"
+    - env:
+        - BUILDMAN="sh4"
+          TOOLCHAIN="sh4"
+    - env:
+        - BUILDMAN="xtensa"
+          TOOLCHAIN="xtensa"
 
     # QA jobs for code analytics
     # static code analysis with cppcheck (we can add --enable=all later)