testsuite: RISC-V: Skip tests using -mcpu= for ILP32E/ILP64E ABIs

The tests are specifying -mcpu with D extension, which is not compatible
with the ILP32E and ILP64E ABIs.  Fix by skipping the tests if toolchain's
default ABI is an E variant.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/pr109508.c: Skip for E ABI.
	* gcc.target/riscv/pr114139.c: Ditto.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>

gcc/testsuite/gcc.target/riscv/pr109508.c

@@ -1,4 +1,4 @@
-/* { dg-do compile } */
+/* { dg-do compile { target { ! riscv_abi_e } } } */
 /* { dg-options "-mcpu=sifive-s76" } */
 
 typedef char __attribute__((__vector_size__ (1))) V;

gcc/testsuite/gcc.target/riscv/pr114139.c

@@ -1,4 +1,4 @@
-/* { dg-do compile } */
+/* { dg-do compile { target { ! riscv_abi_e } } } */
 /* { dg-options "-O2 -fpic -mexplicit-relocs -mcpu=sifive-p450" } */
 
 static void *p;