Enable ppc64

Author: mgiessing

.github/workflows/CI.yml

@@ -37,6 +37,13 @@ jobs:
               CC: aarch64-linux-gnu-gcc
               CXX: aarch64-linux-gnu-g++
               CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: aarch64-linux-gnu-g++
+          - runner: ubuntu-latest
+            target: ppc64le
+            apt_packages: crossbuild-essential-ppc64le
+            custom_env:
+              CC: powerpc64le-linux-gnu-gcc
+              CXX: powerpc64le-linux-gnu-g++
+              CARGO_TARGET_POWERPC64LE_UNKNOWN_LINUX_GNU_LINKER: powerpc64le-linux-gnu-g++
           - runner: ubuntu-latest
             target: armv7
             apt_packages: crossbuild-essential-armhf