Add support for Arm-specific vector types

GCC on Arm-only supports additional vector types that compile to
hardware-supported types.

Author: tautschnig

src/ansi-c/compiler_headers/gcc_builtin_headers_types.h

@@ -45,4 +45,13 @@ enum __gcc_atomic_memmodels {
 };
 
 typedef unsigned char __tile __attribute__ ((__vector_size__ (1024)));
+
+// GCC and Clang use the following on ARM:
+typedef float __Float32x4_t __attribute__ ((__vector_size__ (16)));
+typedef double __Float64x2_t __attribute__ ((__vector_size__ (16)));
+// The following ARM (scalable vector) extensions define vectors the size of
+// which is not known at compile time.
+typedef float *__SVFloat32_t;
+typedef double *__SVFloat64_t;
+typedef __CPROVER_bool *__SVBool_t;
 // clang-format on