Indent nested conditionals

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/Makefile b/tests/Makefile
index 29197b7..b044d25 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -47,20 +47,21 @@
 endif
 
 ifdef WINDOWS_BUILD
-DLEXT=dll
-EXEXT=.exe
-LOCAL_LDFLAGS += -lws2_32 -lbcrypt
-ifdef SHARED
-SHARED_SUFFIX=.$(DLEXT)
-endif
-else
-DLEXT ?= so
-EXEXT=
-SHARED_SUFFIX=
+  DLEXT=dll
+  EXEXT=.exe
+  LOCAL_LDFLAGS += -lws2_32 -lbcrypt
+  ifdef SHARED
+    SHARED_SUFFIX=.$(DLEXT)
+  endif
 
-ifeq ($(THREADING),pthread)
-LOCAL_LDFLAGS += -lpthread
-endif
+else # Not building for Windows
+  DLEXT ?= so
+  EXEXT=
+  SHARED_SUFFIX=
+
+  ifeq ($(THREADING),pthread)
+    LOCAL_LDFLAGS += -lpthread
+  endif
 endif
 
 ifdef WINDOWS