add .php extension to executable compile script to mollify rcverify (#84)

diff --git a/core/php7.3Action/Dockerfile b/core/php7.3Action/Dockerfile
index dee03bb..0885ad2 100644
--- a/core/php7.3Action/Dockerfile
+++ b/core/php7.3Action/Dockerfile
@@ -83,8 +83,8 @@
 COPY --from=builder_source /bin/proxy /bin/proxy_source
 COPY --from=builder_release /bin/proxy /bin/proxy_release
 RUN mv /bin/proxy_${GO_PROXY_BUILD_FROM} /bin/proxy
-ADD compile /bin/compile
+ADD compile.php /bin/compile.php
 ADD runner.php /bin/runner.php
-ENV OW_COMPILER=/bin/compile
+ENV OW_COMPILER=/bin/compile.php
 
 ENTRYPOINT [ "/bin/proxy" ]
diff --git a/core/php7.3Action/compile b/core/php7.3Action/compile.php
similarity index 100%
rename from core/php7.3Action/compile
rename to core/php7.3Action/compile.php
diff --git a/core/php7.4Action/Dockerfile b/core/php7.4Action/Dockerfile
index 24b2fa1..45b0d9f 100644
--- a/core/php7.4Action/Dockerfile
+++ b/core/php7.4Action/Dockerfile
@@ -82,8 +82,8 @@
 COPY --from=builder_source /bin/proxy /bin/proxy_source
 COPY --from=builder_release /bin/proxy /bin/proxy_release
 RUN mv /bin/proxy_${GO_PROXY_BUILD_FROM} /bin/proxy
-ADD compile /bin/compile
+ADD compile.php /bin/compile.php
 ADD runner.php /bin/runner.php
-ENV OW_COMPILER=/bin/compile
+ENV OW_COMPILER=/bin/compile.php
 
 ENTRYPOINT [ "/bin/proxy" ]
diff --git a/core/php7.4Action/compile b/core/php7.4Action/compile.php
similarity index 100%
rename from core/php7.4Action/compile
rename to core/php7.4Action/compile.php