Update HUGO_ARCH for arm-linux-gnueabihf target

setup.py

@@ -39,6 +39,7 @@
     "x86": "386",
     "s390x": "s390x",
     "ppc64le": "ppc64le",
+    "armv7l": "arm",
 }[platform.machine()]
 
 # Name of the Hugo binary that will be built
@@ -133,6 +134,9 @@ def run(self):
         os.environ["GOARCH"] = os.environ.get("GOARCH", self.hugo_arch)
         # i.e., allow override if GOARCH is set!
 
+        if os.environ.get("GOARCH") == "arm" and os.environ.get("GOOS") == "linux":
+            os.environ["GOARM"] = os.environ.get("GOARM", "7")
+
         # Build Hugo from source using the Go toolchain, place it into GOBIN
         # Requires the following dependencies:
         #