tests: do not use a GNU bash script to check the minimum version of programs

find_program() can check that for us already, there's no need to
require GNU bash on systems that default to other POSIX shells.

Even though this is the *linuxlike* tests and a POSIX shell is
guaranteed, there is actually no need to require a shell at all. It's
*easier* to use the meson builtin functionality here.

test cases/linuxlike/13 cmake dependency/cmVers.sh

@@ -1,6 +0,0 @@
-#!/usr/bin/env bash
-
-VERS=$(cmake --version | grep "cmake version")
-VERS=${VERS//cmake version/}
-
-echo -n $VERS

test cases/linuxlike/13 cmake dependency/meson.build

@@ -6,9 +6,6 @@ if not find_program('cmake', required: false).found()
   error('MESON_SKIP_TEST cmake binary not available.')
 endif
 
-# CMake version
-cm_vers = run_command(find_program('./cmVers.sh'), check: true).stdout().strip()
-
 # Zlib is probably on all dev machines.
 
 dep = dependency('ZLIB', version : '>=1.2', method : 'cmake')
@@ -69,7 +66,7 @@ test('zlibtest4', exe4)
 
 # Test some edge cases with spaces, etc. (but only for CMake >= 3.15)
 
-if cm_vers.version_compare('>=3.15')
+if find_program('cmake', required: false, version: '>=3.15').found()
   testDep1 = dependency('ImportedTarget', required : true, method : 'cmake', cmake_module_path : 'cmake', modules: 'mesonTestLibDefs')
   testDep2 = dependency('ImportedTarget', required : true, method : 'cmake', cmake_module_path : 'cmake', modules : ['MesonTest::TestLibDefs'])
   testFlagSet1 = executable('testFlagSet1', ['testFlagSet.c'], dependencies: [testDep1])