vendor-boringssl: Add armv7 build

Author: orobio

scripts/vendor-boringssl.sh

@@ -105,12 +105,14 @@ function mangle_symbols {
             swift build --product CCryptoBoringSSL
         docker run -t -i --rm --privileged -v$(pwd):/src -w/src --platform linux/amd64 swift:5.8-jammy \
             swift build --product CCryptoBoringSSL
+        docker run -t -i --rm --privileged -v$(pwd):/src -w/src --platform linux/amd64 orobio/swift-armv7-cross-bullseye:5.10 \
+            swift build --product CCryptoBoringSSL --destination /opt/swift-armv7-sysroot.json
 
         # Now we need to generate symbol mangles for Linux. We can do this in
         # one go for all of them.
         (
             cd "${SRCROOT}"
-            go run "util/read_symbols.go" -obj-file-format elf -out "${TMPDIR}/symbols-linux-all.txt" "${HERE}"/.build/*-unknown-linux-gnu/debug/libCCryptoBoringSSL.a
+            go run "util/read_symbols.go" -obj-file-format elf -out "${TMPDIR}/symbols-linux-all.txt" "${HERE}"/.build/*-unknown-linux-gnu*/debug/libCCryptoBoringSSL.a
         )
 
         # Now we concatenate all the symbols together and uniquify it.