runtime_loader: fix failures in the test suite.

* use --no-as-needed on Linux as the default changed some time ago.
* adjust LD_LIBRARY_PATH/LIBRARY_PATH to load in the current directory.
* fix some builds of program with compile_lib.

Only dlopen_lookup_next1 fails on Ubuntu 18.04.02 x86_64.

Change-Id: I6ecf70f742f67ab24d7d00fa615baa209634d02c
Reviewed-on: https://review.haiku-os.org/c/1140
Reviewed-by: waddlesplash <[email protected]>

src/tests/system/runtime_loader/test_suite/dlopen_resolve_order1

@@ -70,7 +70,7 @@ main()
 EOI
 
 # build
-compile_lib_dl -o program program.c
+compile_program_dl -o program program.c
 
 # run
 test_run_ok ./program 1

src/tests/system/runtime_loader/test_suite/dlopen_resolve_order2

@@ -80,7 +80,7 @@ main()
 EOI
 
 # build
-compile_lib_dl -o program program.c
+compile_program_dl -o program program.c
 
 # run
 test_run_ok ./program 2

src/tests/system/runtime_loader/test_suite/dlopen_resolve_order4

@@ -87,7 +87,7 @@ main()
 EOI
 
 # build
-compile_lib_dl -o program program.c
+compile_program_dl -o program program.c
 
 # run
 test_run_ok ./program 2

src/tests/system/runtime_loader/test_suite/test_setup

@@ -22,6 +22,12 @@ test_run_ok()
 		exit 1
 	fi
 
+	case $os in
+		FreeBSD|Linux)	export LD_LIBRARY_PATH=.:$LD_LIBRARY_PATH;;
+		Haiku)		export LIBRARY_PATH=.:$LIBRARY_PATH;;
+		*)			echo "Unsupported OS: $os"; exit 1;;
+	esac
+
 	# run
 	$1
 	retval=$?
@@ -33,7 +39,7 @@ test_run_ok()
 
 compile_lib()
 {
-	gcc -shared $@ -D_GNU_SOURCE -fPIC
+	gcc -shared -Wl,--no-as-needed -D_GNU_SOURCE -fPIC $@
 }
 
 compile_lib_dl()
@@ -43,7 +49,7 @@ compile_lib_dl()
 
 compile_program()
 {
-	gcc $@ -D_GNU_SOURCE -Wl,-rpath,.,--export-dynamic
+	gcc -Wl,--no-as-needed $@ -D_GNU_SOURCE -Wl,-rpath,.,--export-dynamic
 }
 
 compile_program_dl()