[gpac] small script changes to facilitate local debug (google#11633)

* use testsuite as submodule
* update workdir to work with local source mounts

Author: aureliendavid

projects/gpac/Dockerfile

@@ -16,7 +16,7 @@
 
 FROM gcr.io/oss-fuzz-base/base-builder
 RUN apt-get update && apt-get install -y build-essential pkg-config libz-dev
-RUN git clone https://github.com/gpac/gpac && git clone https://github.com/gpac/testsuite
+RUN git clone https://github.com/gpac/gpac && cd gpac && git submodule update --init --remote --recursive
 
-WORKDIR $SRC
 COPY build.sh $SRC/
+WORKDIR $SRC/gpac

projects/gpac/build.sh

@@ -15,12 +15,11 @@
 #
 ################################################################################
 
-cd gpac
 ./configure --static-build --extra-cflags="${CFLAGS}" --extra-ldflags="${CFLAGS}"
 make
 
 
-fuzzers=$(find $SRC/testsuite/oss-fuzzers -name "fuzz_*.c")
+fuzzers=$(find $SRC/gpac/testsuite/oss-fuzzers -name "fuzz_*.c")
 for f in $fuzzers; do
 
     fuzzerName=$(basename $f .c)
@@ -32,8 +31,8 @@ for f in $fuzzers; do
       -lm -lz -lpthread -lssl -lcrypto -DGPAC_HAVE_CONFIG_H
 
 
-    if [ -d "$SRC/testsuite/oss-fuzzers/${fuzzerName}_corpus" ]; then
-        zip -j $OUT/${fuzzerName}_seed_corpus.zip $SRC/testsuite/oss-fuzzers/${fuzzerName}_corpus/*
+    if [ -d "$SRC/gpac/testsuite/oss-fuzzers/${fuzzerName}_corpus" ]; then
+        zip -j $OUT/${fuzzerName}_seed_corpus.zip $SRC/gpac/testsuite/oss-fuzzers/${fuzzerName}_corpus/*
     fi
 
 done