travis: Add PowerPC jobs

Signed-off-by: Rashmica Gupta <rashmica.gupta@au1.ibm.com>
diff --git a/.travis.yml b/.travis.yml
index 22b0d1e..deafdfa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -28,6 +28,16 @@
     env:
       TOOLCHAIN=NATIVE
       TARGET=native
+  - os: linux-ppc64le
+    compiler: gcc
+    env:
+      TOOLCHAIN=NATIVE
+      TARGET=native
+  - os: linux-ppc64le
+    compiler: clang
+    env:
+      TOOLCHAIN=NATIVE
+      TARGET=native
   # Toolchains for little-endian, 64-bit ARMv8 for GNU/Linux systems
   - os: linux
     env: