#48 Libtool does not identify compiler

[Brook]

When openjade 1.3.2 is compiled with a compiler located in a non-standard place, libtool does not correctly identify the compiler. The correct fix is to use --tag consistently to identify the compiler to libtool. This is described in the libtool documentation: https://www.gnu.org/software/libtool/manual/html_node/Tags.html The attached patches fix this.