Port the popt argument parsing library

This is required for the sgdisk tool.

lib/import/import-popt.mk

@@ -0,0 +1,3 @@
+POPT_DIR := $(call select_from_ports,popt)/src/lib/popt
+
+INC_DIR += $(POPT_DIR)

lib/mk/popt.mk

@@ -0,0 +1,21 @@
+POPT_DIR := $(call select_from_ports,popt)/src/lib/popt
+
+LIBS += libc
+
+SRC_C := lookup3.c
+SRC_C += popt.c
+SRC_C += poptconfig.c
+SRC_C += popthelp.c
+SRC_C += poptint.c
+SRC_C += poptparse.c
+SRC_C += tdict.c
+
+CC_C_OPT += -Wno-implicit-function-declaration -Wno-unused-but-set-variable -Wno-unused-variable
+
+CC_CXX_WARN_STRICT =
+
+INC_DIR += $(POPT_DIR)
+
+vpath %.c $(POPT_DIR)
+
+SHARED_LIB = 1

lib/symbols/popt

@@ -0,0 +1,46 @@
+poptAddAlias T
+poptAddItem T
+poptAliasOptions B 48
+poptBadOption T
+poptBitsAdd T
+poptBitsArgs T
+poptBitsChk T
+poptBitsClr T
+poptBitsDel T
+poptBitsIntersect T
+poptBitsUnion T
+poptConfigFileToString T
+poptDupArgv T
+poptFini T
+poptFreeContext T
+poptGetArg T
+poptGetArgs T
+poptGetContext T
+poptGetInvocationName T
+poptGetNextOpt T
+poptGetOptArg T
+poptHelpOptions D 192
+poptHelpOptionsI18N D 8
+poptInit T
+poptJlu32lpair T
+poptParseArgvString T
+poptPeekArg T
+poptPrintHelp T
+poptPrintUsage T
+poptReadConfigFile T
+poptReadConfigFiles T
+poptReadDefaultConfig T
+poptReadFile T
+poptResetContext T
+poptSaneFile T
+poptSaveBits T
+poptSaveInt T
+poptSaveLong T
+poptSaveLongLong T
+poptSaveShort T
+poptSaveString T
+poptSetExecPath T
+poptSetOtherOptionHelp T
+poptStrerror T
+poptStrippedArgv T
+poptStuffArgs T