[log]: Normal log works on Linux now

* also removed strlcpy dependency from log
* added Kconfig option for linux target

Closes IDF-3245

components/log/CMakeLists.txt

@@ -1,15 +1,23 @@
-list(APPEND srcs "log.c"
-                 "log_buffers.c")
+idf_build_get_property(target IDF_TARGET)
+set(srcs "log.c")
+if(${target} STREQUAL "linux")
+    # We leave log buffers out for now on Linux since it's rarely used
+    list(APPEND srcs "log_linux.c")
+else()
+    list(APPEND srcs "log_buffers.c")
+    list(APPEND priv_requires soc)
+endif()
 
 idf_component_register(SRCS ${srcs}
                     INCLUDE_DIRS "include"
                     LDFRAGMENTS linker.lf
-                    PRIV_REQUIRES soc)
+                    PRIV_REQUIRES ${priv_requires})
 
-idf_build_get_property(build_components BUILD_COMPONENTS)
-# Ideally, FreeRTOS shouldn't be included into bootloader build, so the 2nd check should be unnecessary
-if(freertos IN_LIST BUILD_COMPONENTS AND NOT BOOTLOADER_BUILD)
-    target_sources(${COMPONENT_TARGET} PRIVATE log_freertos.c)
-else()
-    target_sources(${COMPONENT_TARGET} PRIVATE log_noos.c)
+if(NOT ${target} STREQUAL "linux")
+    # Ideally, FreeRTOS shouldn't be included into bootloader build, so the 2nd check should be unnecessary
+    if(freertos IN_LIST BUILD_COMPONENTS AND NOT BOOTLOADER_BUILD)
+        target_sources(${COMPONENT_TARGET} PRIVATE log_freertos.c)
+    else()
+        target_sources(${COMPONENT_TARGET} PRIVATE log_noos.c)
+    endif()
 endif()