CDRIVER-2292 fix --with-snappy/zlib=no

Author: ajdavis

build/autotools/CheckSnappy.m4

@@ -25,10 +25,12 @@ AS_IF([test "x${found_snappy}" = xyes], [
    AS_IF([test "x${with_snappy}" = xauto -o "x${with_snappy}" = xbundled], [
       with_snappy=bundled
    ], [
-      # snappy not found, with-snappy=system
-      AC_MSG_ERROR([Cannot find system installed snappy. try --with-snappy=bundled])
-   ]
-)])
+      AS_IF([test "x${with_snappy}" = xno ], [], [
+         # snappy not found, with-snappy=system
+         AC_MSG_ERROR([Cannot find system installed snappy. try --with-snappy=bundled])
+      ])
+   ])
+])
 
 # If we are using the bundled snappy, recurse into its configure.
 AS_IF([test "x${with_snappy}" = xbundled],[

build/autotools/CheckZlib.m4

@@ -29,10 +29,12 @@ AS_IF([test "x${found_zlib}" = "xyes"], [
    AS_IF([test "x${with_zlib}" = xauto -o "x${with_zlib}" = xbundled], [
       with_zlib=bundled
    ], [
-      # zlib not found, with-zlib=system
-      AC_MSG_ERROR([Cannot find system installed zlib. try --with-zlib=bundled])
-   ]
-)])
+      AS_IF([test "x${with_zlib}" = xno], [], [
+         # zlib not found, with-zlib=system
+         AC_MSG_ERROR([Cannot find system installed zlib. try --with-zlib=bundled])
+      ])
+   ])
+])
 
 
 # If we are using the bundled zlib, recurse into its configure.