Fix whitespace in CMakeLists.txt

- all spaces no tabs
- indent with 4 spaces everywhere
diff --git a/programs/ssl/CMakeLists.txt b/programs/ssl/CMakeLists.txt
index a2f5dc2..1e65633 100644
--- a/programs/ssl/CMakeLists.txt
+++ b/programs/ssl/CMakeLists.txt
@@ -2,18 +2,18 @@
 find_package(Threads)
 
 set(libs
-     mbedtls
+    mbedtls
 )
 
 set(targets
-     dtls_client
-     dtls_server
-     ssl_client1
-     ssl_client2
-     ssl_server
-     ssl_fork_server
-     ssl_mail_client
-     mini_client
+    dtls_client
+    dtls_server
+    ssl_client1
+    ssl_client2
+    ssl_server
+    ssl_fork_server
+    ssl_mail_client
+    mini_client
 )
 
 if(USE_PKCS11_HELPER_LIBRARY)
diff --git a/programs/test/CMakeLists.txt b/programs/test/CMakeLists.txt
index d0116c5..0ed7145 100644
--- a/programs/test/CMakeLists.txt
+++ b/programs/test/CMakeLists.txt
@@ -1,5 +1,5 @@
 set(libs
-     mbedtls
+    mbedtls
 )
 
 if(USE_PKCS11_HELPER_LIBRARY)
diff --git a/programs/util/CMakeLists.txt b/programs/util/CMakeLists.txt
index f302de7..f9b6604 100644
--- a/programs/util/CMakeLists.txt
+++ b/programs/util/CMakeLists.txt
@@ -1,5 +1,5 @@
 set(libs
-     mbedtls
+    mbedtls
 )
 
 add_executable(strerror strerror.c)
diff --git a/programs/x509/CMakeLists.txt b/programs/x509/CMakeLists.txt
index 4e39e45..39b8b5b 100644
--- a/programs/x509/CMakeLists.txt
+++ b/programs/x509/CMakeLists.txt
@@ -1,5 +1,5 @@
 set(libs
-     mbedtls
+    mbedtls
 )
 
 if(USE_PKCS11_HELPER_LIBRARY)