Test to demonstrate assert bug on alpine

The user added assert in this test does not get coverage under alpine
linux.

regression/cbmc/simple_assert/main.c

@@ -0,0 +1,9 @@
+#include <assert.h>
+
+int main(int argc, char *argv[])
+{
+  int x = 5;
+  assert(x == 5);
+
+  return 0;
+}

regression/cbmc/simple_assert/test.desc

@@ -0,0 +1,13 @@
+CORE
+main.c
+--cover location
+^EXIT=0$
+^SIGNAL=0$
+^\[main\.coverage\.1\] .* function main block 1: SATISFIED$
+(1 of 1|3 of 3) covered \(100\.0%\)$
+--
+^warning: ignoring
+^CONVERSION ERROR$
+^\[main\.coverage\..\] .* function main block .: FAILED$
+--
+On Windows/Visual Studio, "assert" does not introduce any branching.