Adjust Guile config params and CFlags to build with current Mingw-w64.

Author: jralls

gnucash.modules

@@ -103,7 +103,7 @@
     </dependencies>
   </autotools>
 
-  <autotools id="guile2" autogen-sh="autoreconf" autogenargs="--disable-rpath --enable-networking --enable-nls --enable-posix --enable-regex --with-threads=no --with-modules --disable-static">
+  <autotools id="guile2" autogen-sh="autoreconf" autogenargs="--disable-rpath --enable-networking --enable-nls --enable-posix --enable-regex --without-64-calls --with-threads=no --with-modules --disable-static">
     <branch repo="sourceforge" module="gnucash/Dependencies/guile-2.2.7.3-5ef31.tar.xz"
 	    version=" 2.2.7.3-5ef31">
       <patch file="guile-2.2.7.3-getpagesize-decl.patch" strip="0"/>

jhbuildrc.in

@@ -91,3 +91,5 @@ _cflags = os.environ['CFLAGS'] if 'CFLAGS' in os.environ else ""
 
 module_extra_env['bdw-gc']={'CFLAGS':_cflags + ' -fcommon'}
 module_extra_env['gwenhywfar'] = {'CFLAGS':_cflags + " -Wno-incompatible-pointer-types"}
+module_extra_env['pgsql'] = {'CFLAGS':_cflags + " -std=c11 -DWIN32 -D_cdecl=__cdecl"}
+module_extra_env['guile2'] = {'CFLAGS':_cflags + '-Wno-int-conversion -Wno-implicit-function-declaration -Wno-maybe-uninitialized'}