[source] libressl: disable shared libraries, fixes build issues

[LEDE Commits]

nbd pushed a commit to source.git, branch master:
https://git.lede-project.org/2fd5ce9488d11c7e6eee7dc30f128bd12be889f5

commit 2fd5ce9488d11c7e6eee7dc30f128bd12be889f5
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Wed Dec 28 01:10:37 2016 +0100

    libressl: disable shared libraries, fixes build issues
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
---
 tools/libressl/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/libressl/Makefile b/tools/libressl/Makefile
index 27f8496..1e3a6f8 100644
--- a/tools/libressl/Makefile
+++ b/tools/libressl/Makefile
@@ -21,4 +21,6 @@ HOST_BUILD_PARALLEL:=1
 
 include $(INCLUDE_DIR)/host-build.mk
 
+HOST_CONFIGURE_ARGS += --disable-shared
+
 $(eval $(call HostBuild))