selftests: vDSO: remove unnecessary command line defs from chacha test

CONFIG_FUNCTION_ALIGNMENT=0 is no longer necessary and BULID_VDSO wasn't
spelled right while BUILD_VDSO isn't necessary, so just remove these.
Reported-by: Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

tools/testing/selftests/vDSO/Makefile

@@ -46,5 +46,4 @@ $(OUTPUT)/vdso_test_chacha: LDLIBS += $(SODIUM_LIBS)
 $(OUTPUT)/vdso_test_chacha: CFLAGS += -idirafter $(top_srcdir)/tools/include \
                                       -idirafter $(top_srcdir)/arch/$(ARCH)/include \
                                       -idirafter $(top_srcdir)/include \
-                                      -D__ASSEMBLY__ -DBULID_VDSO -DCONFIG_FUNCTION_ALIGNMENT=0 \
-                                      -Wa,--noexecstack $(SODIUM_CFLAGS)
+                                      -D__ASSEMBLY__ -Wa,--noexecstack $(SODIUM_CFLAGS)