spirv_new: avoid GLOB for sources in CMakeLists (#1907)

Using `GLOB` here breaks incremental builds when switching between
branches (e.g. when trying out a pull request).  The CMake
documentation discourages use of `GLOB` to collect a list of source
files, so list all source files explicitly.

Signed-off-by: Sven van Haastregt <sven.vanhaastregt@arm.com>

test_conformance/spirv_new/CMakeLists.txt

@@ -1,6 +1,33 @@
 set(MODULE_NAME SPIRV_NEW)
 
-file(GLOB SPIRV_NEW_SOURCES "*.cpp")
+set(${MODULE_NAME}_SOURCES
+  main.cpp
+  test_basic_versions.cpp
+  test_cl_khr_expect_assume.cpp
+  test_cl_khr_spirv_no_integer_wrap_decoration.cpp
+  test_decorate.cpp
+  test_get_program_il.cpp
+  test_linkage.cpp
+  test_op_atomic.cpp
+  test_op_branch_conditional.cpp
+  test_op_branch.cpp
+  test_op_composite_construct.cpp
+  test_op_constant.cpp
+  test_op_copy_object.cpp
+  test_op_fmath.cpp
+  test_op_function.cpp
+  test_op_lifetime.cpp
+  test_op_loop_merge.cpp
+  test_op_negate.cpp
+  test_op_opaque.cpp
+  test_op_phi.cpp
+  test_op_selection_merge.cpp
+  test_op_spec_constant.cpp
+  test_op_undef.cpp
+  test_op_vector_extract.cpp
+  test_op_vector_insert.cpp
+  test_op_vector_times_scalar.cpp
+)
 
 set(TEST_HARNESS_SOURCES
   ../../test_conformance/math_brute_force/reference_math.cpp