package/lapack: fix build without BUILD_COMPLEX

Fix the following build failure without BUILD_COMPLEX raised since bump
to version 3.10.1 in commit b3e96b1fb0d0a7245cea6921fcdd7986762e5ec1 and
https://github.com/Reference-LAPACK/lapack/commit/bd1fba15d0d6f54891cb822f4ab2e8afd0a3ea4b:

CMake Error at LAPACKE/CMakeLists.txt:38 (message):
  LAPACKE_BUILD_COMPLEX requires BUILD_COMPLEX to be ON

CMake Error at LAPACKE/CMakeLists.txt:38 (message):
  LAPACKE_BUILD_COMPLEX16 requires BUILD_COMPLEX16 to be ON

Fixes:
 - http://autobuild.buildroot.org/results/418d15f734c87a70edf0d670c0548d550e6e70ba

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/lapack/lapack.mk

@@ -14,9 +14,17 @@ LAPACK_SUPPORTS_IN_SOURCE_BUILD = NO
 LAPACK_CONF_OPTS = -DLAPACKE=ON -DCBLAS=ON
 
 ifeq ($(BR2_PACKAGE_LAPACK_COMPLEX),y)
-LAPACK_CONF_OPTS += -DBUILD_COMPLEX=ON -DBUILD_COMPLEX16=ON
+LAPACK_CONF_OPTS += \
+	-DBUILD_COMPLEX=ON \
+	-DBUILD_COMPLEX16=ON \
+	-DLAPACKE_BUILD_COMPLEX=ON \
+	-DLAPACKE_BUILD_COMPLEX16=ON
 else
-LAPACK_CONF_OPTS += -DBUILD_COMPLEX=OFF -DBUILD_COMPLEX16=OFF
+LAPACK_CONF_OPTS += \
+	-DBUILD_COMPLEX=OFF \
+	-DBUILD_COMPLEX16=OFF \
+	-DLAPACKE_BUILD_COMPLEX=OFF \
+	-DLAPACKE_BUILD_COMPLEX16=OFF
 endif
 
 $(eval $(cmake-package))