Add armhf build to Travis CI

Fixes #676

ci/before_deploy.sh

@@ -6,8 +6,12 @@ set -ex
 
 # Generate artifacts for release
 mk_artifacts() {
-    RUSTFLAGS="-C target-feature=+ssse3" \
-      cargo build --target $TARGET --release --features simd-accel
+    if is_ssse3_target; then
+        RUSTFLAGS="-C target-feature=+ssse3" \
+        cargo build --target $TARGET --release --features simd-accel
+    else
+        cargo build --target $TARGET --release
+    fi
 }
 
 mk_tarball() {
@@ -15,11 +19,12 @@ mk_tarball() {
     local td=$(mktempd)
     local out_dir=$(pwd)
     local name="${PROJECT_NAME}-${TRAVIS_TAG}-${TARGET}"
-    mkdir "$td/$name"
+    local gcc_prefix="$(gcc_prefix)"
+    mkdir "${td:?}/${name}"
     mkdir "$td/$name/complete"
 
     cp target/$TARGET/release/rg "$td/$name/rg"
-    strip "$td/$name/rg"
+    ${gcc_prefix}strip "$td/$name/rg"
     cp {doc/rg.1,README.md,UNLICENSE,COPYING,LICENSE-MIT} "$td/$name/"
     cp \
       target/$TARGET/release/build/ripgrep-*/out/{rg.bash-completion,rg.fish,_rg.ps1} \