fixes for issues identified by Jenkins run:

Makefile.am: clean .build_params file;

ecc.c: fix misplaced gat #endif in wc_ecc_shared_secret_gen_sync();

move AM_CFLAGS+=-include /.build_params to before AC_SUBST([]AM_CFLAGS);

fix new unused-label defect in wc_ecc_shared_secret_gen_sync();

fix integer.[ch] mp_exch() to return int not void (sp_exch() and TFM mp_exch() can both fail on allocations);

fix NO_INLINE ForceZero() prototype;

ecc.c: add missing if (err == MP_OKAY) in build_lut();

wolfcrypt/test/test.c: revert "rename hkdf_test to wc_hkdf_test to eliminate namespace collision", restoring unconditional static qualifier, to fix crash at return from main() on Xilinx Zynq ARM test;

ecc.c: refactor build_lut() flow control to fix uninited variable scenario found by scan-build;

WOLFCRYPT_ONLY and OPENSSL_EXTRA: fix gating to allow successful build with --enable-all-crypto, and add configure error if crypt-only and opensslall are combined.

wolfcrypt/src/integer.c

@@ -537,13 +537,14 @@ void mp_clamp (mp_int * a)
 /* swap the elements of two integers, for cases where you can't simply swap the
  * mp_int pointers around
  */
-void mp_exch (mp_int * a, mp_int * b)
+int mp_exch (mp_int * a, mp_int * b)
 {
   mp_int  t;
 
   t  = *a;
   *a = *b;
   *b = t;
+  return MP_OKAY;
 }
 
 int mp_cond_swap_ct (mp_int * a, mp_int * b, int c, int m)