llext: enlarge test coverage

There is no reason the syscall tests should not be perfomed on
relocatable builds. This made some test runs pass even though
issues were present in those configurations.

Remove the build gate.

Signed-off-by: Luca Burelli <[email protected]>

Author: pillo79

tests/subsys/llext/simple/src/test_llext_simple.c

@@ -304,7 +304,6 @@ static LLEXT_CONST uint8_t object_ext[] ELF_ALIGN = {
 };
 LLEXT_LOAD_UNLOAD(object)
 
-#ifndef CONFIG_LLEXT_TYPE_ELF_RELOCATABLE
 static LLEXT_CONST uint8_t syscalls_ext[] ELF_ALIGN = {
 	#include "syscalls.inc"
 };
@@ -316,7 +315,6 @@ static LLEXT_CONST uint8_t threads_kernel_objects_ext[] ELF_ALIGN = {
 LLEXT_LOAD_UNLOAD(threads_kernel_objects,
 	.test_setup = threads_objects_test_setup,
 )
-#endif
 
 #ifndef CONFIG_LLEXT_TYPE_ELF_OBJECT
 static LLEXT_CONST uint8_t multi_file_ext[] ELF_ALIGN = {