Add missing armv7 library variants.

    This patch adds the following library variants.

            1. armv7r hard_vfpv3xd
            2. armv7a soft_vfpv3_d16.

   Also disable the math_errhandling tests to the set of disabled
   tests for the armv7r_hard_vfpv3xd library variant.These tests were
   already disabled for the previously existing variants, due to a known
   issue in compiler-rt where the floating point exceptions are not set
   correctly for computations on types implemented in software.

CMakeLists.txt

@@ -1605,7 +1605,7 @@ add_library_variants_for_cpu(
 )
 add_library_variants_for_cpu(
     armv7a
-    SUFFIX softfp_vfpv3_d16
+    SUFFIX soft_vfpv3_d16
     COMPILE_FLAGS "-mfloat-abi=softfp -march=armv7a -mfpu=vfpv3-d16"
     MULTILIB_FLAGS "--target=armv7-unknown-none-eabi -mfpu=vfpv3-d16"
     PICOLIBC_BUILD_TYPE "release"
@@ -1656,9 +1656,9 @@ add_library_variants_for_cpu(
 )
 add_library_variants_for_cpu(
     armv7r
-    SUFFIX soft_vfpv3_d16
-    COMPILE_FLAGS "-mfloat-abi=soft -march=armv7r -mfpu=vfpv3-d16"
-    MULTILIB_FLAGS "--target=armv7r-unknown-none-eabihf -mfpu=vfpv3-d16"
+    SUFFIX hard_vfpv3xd
+    COMPILE_FLAGS "-mfloat-abi=hard -march=armv7r -mfpu=vfpv3xd"
+    MULTILIB_FLAGS "--target=armv7r-unknown-none-eabihf -mfpu=vfpv3xd"
     PICOLIBC_BUILD_TYPE "release"
     QEMU_MACHINE "none"
     QEMU_CPU "cortex-r5f"

test-support/picolibc-test-wrapper.py

@@ -18,6 +18,8 @@
     # https://github.com/picolibc/picolibc/pull/500
     "picolibc_armv7m_soft_fpv4_sp_d16-build/test/math_errhandling",
     "picolibc_armv7m_hard_fpv4_sp_d16-build/test/math_errhandling",
+    "picolibc_armv7r_hard_vfpv3xd-build/test/math_errhandling",
+    "picolibc_armv7r_hard_vfpv3xd_exn_rtti-build/test/math_errhandling",
     "picolibc_armv8.1m.main_hard_fp_nomve-build/test/math_errhandling",
     "picolibc_armv7m_soft_fpv4_sp_d16_exn_rtti-build/test/math_errhandling",
     "picolibc_armv7m_hard_fpv4_sp_d16_exn_rtti-build/test/math_errhandling",