[lldb][test] Disable PIE for some API tests

These tests fail when PIE is enabled by default on a platform since
`target variable` can't read global string variable value before
running inferior.

Author: dzhidzhoev

lldb/test/API/commands/target/basic/Makefile

@@ -3,4 +3,8 @@
 # C_SOURCES := b.c
 # EXE := b.out
 
+ifndef PIE
+	LDFLAGS := -no-pie
+endif
+
 include Makefile.rules

lldb/test/API/lang/c/global_variables/Makefile

@@ -2,5 +2,8 @@ C_SOURCES := main.c
 
 DYLIB_NAME := a
 DYLIB_C_SOURCES := a.c
+ifndef PIE
+	LDFLAGS := -no-pie
+endif
 
 include Makefile.rules

lldb/test/API/lang/cpp/char8_t/Makefile

@@ -1,4 +1,7 @@
 CXX_SOURCES := main.cpp
 CXXFLAGS_EXTRAS := -std=c++2a -fchar8_t
+ifndef PIE
+	LDFLAGS := -no-pie
+endif
 
 include Makefile.rules