[PATCH, libphobos] Fix libphobos.shared testsuite for multilib tests

[Johannes Pfau]

Hi,

the loadDR test in the libphobos.shared testsuite tries to dynamically load the 
phobos library. The path for the library currently points to the main multilib 
variant phobos library, causing other multilib variants to fail the test. The 
attached patch uses $blddir instead of $objdir to fix this issue.

---
libphobos/ChangeLog:

2018-11-17  Johannes Pfau  <johannesp...@gmail.com>

    PR d/87824
    * testsuite/libphobos.shared/shared.exp: Set proper path to phobos library 
for multilib builds.

diff --git a/libphobos/testsuite/libphobos.shared/shared.exp 
b/libphobos/testsuite/libphobos.shared/shared.exp
index 5555b3bdd..623e06259 100644
--- a/libphobos/testsuite/libphobos.shared/shared.exp
+++ b/libphobos/testsuite/libphobos.shared/shared.exp
@@ -94,7 +94,7 @@ if { [is-effective-target dlopen] && [is-effective-target 
pthread] } {
     dg-test "$srcdir/$subdir/host.c" "-ldl -pthread" "$DEFAULT_CFLAGS"
 
     # Test requires a command line argument to be passed to the program.
-    set libphobos_run_args "$objdir/../src/.libs/libgphobos.so"
+    set libphobos_run_args "${blddir}/src/.libs/libgphobos.${shlib_ext}"
     dg-test "$srcdir/$subdir/loadDR.c" "-ldl -pthread -g" "$DEFAULT_CFLAGS"
     set libphobos_run_args ""
 }