[LibCURL@7] Disable versioned symbols (#8407)

We will not use this version in Julia (it's too old), but we use it as baseline
for building packages depending on libcurl: by having this build without
versioned symbols, it can be used to build packages that will link to libcurl
with both with and without OpenSSL.

L/LibCURL/LibCURL@7/build_tarballs.jl

@@ -27,7 +27,7 @@ FLAGS=(
 
     # A few things we actually enable
     --with-libssh2=${prefix} --with-zlib=${prefix} --with-nghttp2=${prefix}
-    --enable-versioned-symbols
+    --disable-versioned-symbols
 )