Restore llvm10-dev in alpine images (#80)

Author: Brian J. Cardiff

docker/alpine.Dockerfile

@@ -31,6 +31,6 @@ FROM runtime as build
 
 RUN \
   apk add --update --no-cache --force-overwrite \
-    llvm10-static g++
+    llvm10-dev llvm10-static g++
 
 CMD ["/bin/sh"]

linux/Dockerfile

@@ -43,7 +43,7 @@ RUN sed -i 's|--list -- "$@"|--list "$@"|' /usr/bin/ldd
 # Install dependencies
 RUN apk add --no-cache \
       # Statically-compiled llvm
-      llvm10-static \
+      llvm10-dev llvm10-static \
       # Static zlib, libyaml, libxml2, pcre, and libevent
       zlib-static yaml-static libxml2-dev pcre-dev libevent-static \
       # Build tools